Detachable heat circulating attachment



Nov. 7, 1944.

C. R. SIMS DETACHABLE HEAT CIRCULATING ATTACHMENT Filed Sept. 5, 1942 4 Sheets-Sheet l A A 5 ClarenoeR.Sirns, @3343 womq Nov. 7, 1944.

C. R. SIMS DETACHABLE HEAT CIRCULATING ATTACHMENT Filed Sept. 5 1942 4 Sheets-Sheet. 2

C'lare nceR.Si?ns,

Nov. 7, 1944. I

- c. R. SIMS DETAGHABLE HEK'IK CIRGULATING ATTACHMENT Filed Spt. 5, 1942 4 Sheets-Sheet 3' Ular'encell. 121 5, 4M.

Patented Nov. 7, 1944 UNl'l ED STATES PAT ur OFFICE DETACHABLE'HEAT CIRCULATING ATTACHMENT Clarence, R. Sims, Elkhart, Ind. Application September 5, 1942, Serial No. 457,496

4 Claims. (Cl. 126-6),

oiling or the removal of v the entire blower assembly. f

Like numerals designate like; parts in each of the several views. The blower unit employed. is similar to that illustrated and "described in applicants Patent No. 2,272,356, issued February 10, 1942, on Trailer heat andair conditioning device,used in connec-.- tion with a conventional oil-burning heating stove.

On the front side of the, blower. case. .and

, blower unit la in said case there is provided lugs tachmentmay be attached to force the hot air from thevoven downward to and along the floor (the coldest area) andthereby heat the compartment wherein the unit is installed.

During the present emergency, restrictions on the use of iron for the manufacture of heating stoves of. various types, especially those constructed of iron castings, has created a demand for a light weight, economical heating device for house trailers, boats and other applications.

This invention is designed to not only meet that demand, but also to eliminate thenecessity of employing heavy oil-burning stoves for such purposes, by utilizing the oven of the gasoline or electric cooking stove commonly employed in trailers, boats and also many small homes.

This result is accomplished by means of the device herein illustrated and described, in whicha Figure 1 is a front view of a conventional gasoline cooking range with my specially designed oven door, partly open and shown in perspective,

the blower case being shown detached from the oven door in this view in order that a portion of it may be visible;

Fig. 2 is a front elevation of the special door, provided with bayonet hinges for easy removal or emplacement and showing the heat deflectors in broken lines;

Fig. 3 is a bottom, part sectional view of Fig. 2 on the line 3-3 showing the heat deflecting members; a

Fig. 4 is a vertical-sectional view of the oven and door on line 44 of Fig. 2, showing the heat circulating unit in operating position the direction of air currents being indicated by arrows;

Fig. 5 is a top view of the blower unit and case showing the motor driven fans in broken lines;

Fig. 6 is a rear view of the blower case, showing the removable back cover of same and a portion or tabs 2 which may be riveted or welded ,directly to the oven door 3. A removable cover 4 is provided which fits snuglyfover the back of thecase and is aflixed' thereto with screws 5.," The end edges of this'cover are offset, as;are1 also portions of the end edge of the "front plate 2,..as shown at 6 (Fig. 5), to provide afguide-way for the removable panels 1, (Figs. 4, 5 and 6). Y The heat deflector members 8'and 8a (Figs. 2, 3, and 4) are riveted or spot-welded in position to the front side of.the door' 3, so as to communicate with the outlet openings of the/blower fans, as shown.

A triangular shaped cover fliFigs. 1, 2 and-3). is provided to cover,the members 8 and-8a,.and may be rigidly attached to the oven doorby means of clips, screws or rivets, as shown. This triangular shaped cover is provided with a baffle plate I0, extending horizontally across the upper portion of same immediately above the members 8 and L, thus separating the latter from the cool air inlets I l.. 0001 air entering the ports I l passes around and through the motor, thence through holes in the motor shaft l2 (Figs. 4 and 5), and thence out through the heat deflectors 8 and Be as shown. This cooling air circulates through the motor even though the hot air intake side of the fans are closed by the panels I, when fans are running.

. A grill I3 (Fig. 4) provides for the intake of cold air from near the floor, to enter the oven over the hot plate l4 and upwardly into the suction side of thefans from whence it is forced through the heat deflector members '8 and.8a, downwardly in an angular direction toward the floor. Thus, the hot air is forced to each end of the trailer, or space to be heated and, by reason of this circulation, the entire space becomes nearly evenly heated. The arrow lines indicate the directional flow of hot and cool air when the blower unit is running. No combustion gases are circulated by the blower unit, as these gases are exhausted externally through a special vent.

As will be seen, the entire oven door with applicants deflector and blower, may be'easily and quickly attached to the stove, by removing the conventional oven door supplied with the stove, as both doors are equipped with bayonet hinges, as shown.

If the oven is to be used for baking, then the regulator oven door is emplaced, but when the oven is to be used for heating, the regular oven door is removed and. applicants special door emplaced. It will be seen, however, that there is suflicient space below the blower unit to bake a pan of biscuits, pies, etc., without removing the heat circulating unit, in which case. the blower is shut off and the intake side of each fan isclosed with a pair of removable panels, as shown. No cold air will enter the oven through the grill l3 when the blower is not running, or when the panels Tare in position, as shown in Fig. 4.

Applicants forced circulation space: heating device may be manufactured to fit any kind or type of oven, requires no skill to install and operate, is fool-proof. and. efilcient, and will costv less to manufacture than any other present. known type of. heater for. trailers.

A's practically all house trailers are equipped with a gasoline cooking. range and because. pricritics prohibit manufacturers of conventional heating stoves for trailers, this invention solves the problem of trailer heating by employing the gasoline range oven for the purpose and with a minimum ofstrategic materials entering into its production.

What I claim is:

1'. In. a. detachable heat circulating attachment for ovens, the combination of an; oven. door having openings inits lower portion for the intake 01' air, a blower case detachably' connected to said oven door, a blower unit in said case, passages through the oven door for ingress of air into the oven and to the blower, a cover mounted in the oven door, a baffle plate in said cover, and defleeting members in the lower portion of the cover for directing heated air driven out by the blower downwardly toward the floor of the space to be heated.

2. In a' detachable heat circulating attachment for ovens, the combination of an oven door having a grill in its lower portion for the intake of cold air, a triangularly shaped cover affixed to the oven door, said cover being open at the bottom, an approximately central horizontal bafiie plate within the cover, the upper portion of the cover having cold air inlets disposed above the baffle plate, a blower case attached to the inside of the oven door, a blower in said case for circulating the air, and slanting heat deflector members mounted in the cover below the baiile plate for. deflecting the air downwardly 3. Ina space heating device of the type described, adapted to replace a conventional oven door, the combination of an oven door having perforations in its lower portion, a blower case mounted on the inside of the oven door, a blower in said case, a removable cover fitting over the.

back of the case to completely close the blower case whenthe blower is not in use and when it is desired to use the lower portion of the oven for baking without replacing the oven door carrying the blower case with a conventional oven door, opposite edge portions of the blower case cover being offset to provide a support for the removable blower case cover, an outer cover aflixed to the exterior of the oven door and having its bot.- tom portion open, said outer'cover having openings in its upper portion, a horizontally disposed baiiTe plate at about the central portion of said outer cover; and air deflecting members in the lower portion of said cover for directing airfrom the ovendownward-1y toward the floor of the space tobe heated.

4. In' a detachable air circulating attachment of the type described, the combination of a detachable oven door, a perforated cover attached to the outsideof said door, the oven door also having suitable openings for the admission of air received through the cover; a horizontal baflle plate in said cover, a blower case detachably connected to the inside of said oven door, a blower in said case, and means for directing and discharging heated air driven out by the blower downwardly toward the floor of the space to be heated, panels on the blower'case, and means for removably attaching said panels to the blower case to close it and allow normal use of the oven when desired.

CLARENCE R. SIMS. 

